First find out what set the SES light. You will have to have the code read through the OBDII port. Once you determine the problem and fix it then the code can be reset from the code reader or by unhooking the negative battery cable for 10 minutes.
This usually resets the entire PCM and may give you hesitations and stalling symptoms. This indicates a dirty throttle body and it must be taken off and cleaned.
We have all the procedures listed at our enthusiasts forum www.trailvoy.com
How do I reset the service engine light on a 2003 Chevy Trailblazer?
If you don't have a code reader you can disconnect the battery cable for a couple of minutes and that will reset the light
disconnect the battery
How do you reset the computer in a 04 blazer 4.3L
When you change the battery you automatically reset the PCM. Any time you remove the negative battery cable for about 15-20 minutes you will reset the PCM. This will reset your Check engine light also. www.trailvoy.com Trailblazer enthusiasts forum with all the answers for your Trailblazer.
To reset the service engine light on a 2003 Chevy Trailblazer, you can use an OBD-II scanner to clear the trouble codes. Alternatively, you can disconnect the negative battery cable for about 15 minutes to reset the system. After reconnecting, ensure that the light is off; however, if it reappears, it indicates an underlying issue that needs addressing. Always consult a mechanic if you're unsure about the cause of the light.
AnswerIgnition on - engine off - floor the gas pedal 3 times. That's it!
ignition on - engine off - floor the gas pedal 3 times. That's it! LOOK IN YOUR OWNERS MANUAL!
The best and fastest way to reset the instrument panel of 2004 Trailblazer is to disconnect both battery terminals. Reconnect them after about 30 minutes and everything should be reset.
Turn the key on, engine off. Hit the gas pedal to the floor 5 - 6 times. shut the key off. It's now reset. Only reset it when the oil is changed.
To reset the 'Service 4-Wheel Drive' light on a 2002 Chevy Trailblazer after a battery died, you can try disconnecting the negative battery terminal for about 10-15 minutes, then reconnect it. This can sometimes reset the system and clear the warning light. If the light remains on, you may need to use an OBD-II scanner to check for any diagnostic trouble codes and clear them. If issues persist, consult a professional mechanic for further diagnosis.
Get the Trouble code read then have it reset at the same time. You can also disconnect the negative battery terminal for 10 minutes and it will reset. If you have not fixed the problem the code will set again causing your check engine light to come back on.